Locomotive driving box



J. G. BLUNT LOCOMOTIVE DRIVING BOX Flled June 14 1923 Patented Mar. 4, 1924.

UNITED STATES JAMES G. BLUNT, OF SCHENECTADY, NEW YORK.

LOCOMOTIVE DRIVING BOX.

Application filed June 14, 1923. Serial No. 645,306.

To all whom it may concern: Be it known that 1, JAMES G. BLUNT, of Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in Locomotive Driving Boxes, of which improvement the following. is a specification.

2 My invention relates, particularly, to the journal bearings of locomotive driving boxes, and its object is to provide additional bearing surface, located below the horizontal central plane of the driving axle, in order to more nearly equalize the projected bearing surface resisting the thrust of the piston. A further object is the provision of a construction such that all adjustments incident to wear, may be made without removing the appliance from the locomotive, and that, when adjusted in position, it will obviate any tendency of the journal bearing to close in on, or cramp, the axle, by reason of excess of load or heating due to journal friction.

The im rovement claimed is hereinafter fully set orth.

In the accompanying drawings: Figure 1 is a view, half in front elevation, and half in vertical transverse section, of a locomotive driving box, illustrating an application of my invention; Fig. 2, a vertical axial section through the same; Fig. 3, an inverted plan view; Fig. 4, a view, in perspective, of the cellar; Fig. 5, a similar view of asupplemental bearing; and, Fig. 6,

a similar view of an adjusting shim.

In the practice of my invention, referring descriptively to the specific embodiment thereof which is herein exemplified, the driving box, 1, is fitted with a crown brass, 1", in the usual manner, and inwardly and downwardly inclined faces, 1", for the contact of lateral: supplemental bearings, 2, hereinafter described, are machined on its inner sides, below the crown brass. Grooves, 1, are also machined partly through the inclined faces, 1", for the reception of tongues on the supplementalbearings.

Two supplemental bearings, 2, 2, which are curve at top, in conformity with the axle journal on which the driving box is to be laced, and the sides of which are opposite y inclined, are fitted between the inclined faces, 1", of the driving box, and the sides of the cellar, 3, which are inclined in correspondence with the inner sides of the supplemental bearings. Tongues or tenons, 2, formed on the outer sides of the supplemental bearings, engage the grooves, 1, of the driving box, and transverse passages, 2", extend through the suplemental bearings, said passages being engaged by theheads of adjusting bolts, 4, which pass through holes, 3, in lugs, 3*, extending laterally from the cellar, 3, at the bottom thereof, and are. provided with nuts, 4, bearing thereon. Proper adjustment is obtained by the tension of the bolts, 4, and set screws, 5, which pass through holes in thelugs, 3 of the cellar, and are provided with nuts, 5?. bearing on the bottoms of said lugs. It will be seen that the interposition of the cellar between the two adjustable supplemental bearings prevents them from exertling cramping or binding action upon the ax e.

Wear on the bearing surfaces of the crown brass and supplemental bearings, in contact with the axle journal, is taken up by the adjusting bolts, 4, and set screws, 5, to follow the relative upward displacement of the journal. Shims, 6, which are recessed to fit over the tenons, 2, of the supplemental bearings, as shown in Fig. 6, are inserted between the driving box and the supplemental bearings, in order to ensure that the latter will rise vertically, in correspondence with the axle instead of on the inclined lines of the inside of the driving box.

It will be seen that my'invention is readily applicable, at comparatively slight cost, in connection with riving boxes of the present standard construction, and also that it attains, in practice, the important advantage of enablin any and all desired adjustments to be e ected while the axle is in place, and, when adjusted, has no 'tendency to cramp or bind the axle.

I claim as my invention and desire cure by Letters Patent:

1. The combination of a locomotive drivf ing box; a crown brass therein; supplemental bearings, fitted in the driving box, below its horizontal axial plane; and meanstotake up wear of said supplemental bearings by a vertical movement.

to se- 2. The combination of a locomotive driving box; a crown brass therein; supplemental bearings, fitted adjustabl in the driv ing box, below its horizonta axial plane; means to take up wear of said supplemental bearings by a vertical movement; and means, interposed between saidbearings', for preventing cramping action on an axle.

3. The combination of a locomotive driving box; a crown brass therein; supplemental bearings, fitted adjustably in the driving box, below its horizontal axial plane; means to take up wear of said supplemental hearing by a vertical movement; and a cellar, interposed between said supplemental bearings.

4. The combination of a locomotive driving box; a crown brass therein; supplemental bearings, fitted adjustably in the driving box, below its horizontal axial plane; means to take up wear of said supplemental bearings by a vertical movement; and means for ensuring vertical movement of said supplemental bearings in their adjust-- ment.

5. The combination of a locomotive driving box, having the inner surfaces of its walls inwardly and downwardly inclined; a crown brass therein; a cellar, having its side walls, inclined reversely to the surfaces of the driving box; sup .lemental bearings. interposed between the driving box and cellar;

and means to take up wear of said bearings.

6. The combination of a locomotive driving box; a crown brass therein; a cellar having inclined sides; supplemental bearings, interposed between said cellar and surfaces on the driving box, inclined reversely to the sides of the cellar; adjusting bolts engaging said supplemental bearings, an having nuts bearing on the cellar; and set screws, engaging the cellar and having nuts bearing thereon by a vertical movement.

7. The combination of a locomotive driving box; a crown brass therein; supplemental bearings fitted in the driving box: below its axial plane; means to take up wear of said supplemental bearings by a vertical movement and shims, supplemental bearings and the driving box, and having recesses, fitting over projections on the supplemental bearings, for ensuring vertical movement of the supplemental bearings in adjustments.

JAMES G. BLUNT.

\Vitnesses J HowARn WAGAR, HELEN M. EACH.

insertible between said i 

